It would probably be possible to replace the headphone socket but it'll be soldered to the motherboard so you'd need to be reasonably confident with soldering, as well as with disassembling your laptop.
There are a couple of work-arounds: you could get a USB to headphone adapter - they're very cheap on eBay, or you could get a Bluetooth receiver to plug your headphones into and go wireless - rather more expensive, and it'd need charging from time to time, but quite cool.